quick question for you LSJ guys...I have an 04 Cavalier that is supercharged. Im swapping an LSJ motor in (already have it) but I was told that there are better filter/caps than the original ones. Something about the older styles causing oil starvation at higher RPMs? I have the ZZP 78# springs and plan on upping my RPMs a little bit. I have a friend who works at a Chevy dealership so i can get whatever I need at cost.

I already have the 32mm socket for the oil cap as its what I had to use on my L61 as well. And I had no issues changing out my oil filter with the s/c in, i just remove the bypass valve and theres plenty of room.

 

Never heard of the filter caps causing oil starvation....

You should be fine with the stock filter cap & filter.

 

alright thanks. Ill just get whatever the dealership has as a complete package (filter/cap). I know its pretty cheap, just wanted to make sure there wasnt a better option to install since I want to do it right.

Just thought I'd post this here, someone found this from a Saab forum that looks to have been copied from a gm service bulletin:

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The purpose of this bulletin is to provide information about a new design oil filter cap assembly (P/N 12580254) and oil filter element (P/N 12579143) that has been released for service on 2.2L 4-cylinder engines (RPO L61) and supercharged 2.0L 4-cylinder engines (RPO LSJ).

Important
Always inspect for new design oil filter cap. If a new design oil filter cap (P/N 12580254) is present, the new design oil filter element (P/N 12579143) must be used to service this vehicle.

The new design oil filter cap can be identified by the rounded contour of the outer edges, rather than the flat edges on the previous designs. This new design oil filter cap is intended to backservice all previous model year vehicles. The new design oil filter element must be used to service vehicles with this new design oil filter cap. Refer to the "Parts Compatibility" table included in this bulletin for more information.

Notice
Do NOT use an old design oil filter element (P/N 22685727) in combination with the new design oil filter cap . The bypass valve in the new design oil filter cap is designed with increased relief pressure. Use of an old design oil filter element with the new design oil filter cap could result in damage to the engine.

The new design oil filter element can be identified by a slightly smaller inside diameter as well as straight vertical pleats, rather than the previous zigzag pleats.

The below listed are the only correct GM filter and cap numbers to use on the 9-3 2.0 turbo Ecotec. These have the smaller diameter center bore, compared to the larger diameter of the older styles and generic filters such as my old FRAM pictured below.

12580254
PF2259G
Oil filter cap assembly

12579143
PF456G
Oil filter element
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LSJ's would never see this issue.

It was changed sometime mid 04-05

 

This.

 

Just wondering y not just build Ur l61? Forged parts r cheap and u have more displacement.

 

I tried to talk him out of the LSJ swap.

 

Lsj is cool if Ur gona make a ton of hp. But for a 400-500 hp build the l61 would do fine